Can I stop 100 Width Text Boxes from extending beyond their containers

Question

Lets say I have a text box that I want to fill a whole line  I would give it a style like this   input wide  display block  width  100     This causes problems because the width is based on the content of the text box  Text boxes have margin  borders   amp  padding by default  which makes a 100  width text box larger than its container   For example  here on the right     Is there any way to make a text box fill the width of its container without expanding beyond it   Here is some example HTML to show what I mean    lt  DOCTYPE html PUBLIC  -  W3C  DTD XHTML 1 0 Transitional  EN   http   www w3 org TR xhtml1 DTD xhtml1-transitional dtd  gt   lt html xmlns  http   www w3 org 1999 xhtml   gt   lt head gt       lt title gt Untitled Page lt  title gt       lt style type  text css  gt           outer border  1px solid  000  width  320px  margin  0px padding 0px           inner margin  20px  padding  20px  background   999 border  1px solid  000           input wide  display block  margin  0px          input normal  display block  float  right       lt  style gt   lt  head gt   lt body gt       lt div id  outer  gt           lt div id  inner  gt               lt input type  text  class  wide    gt               lt input type  text  class  normal    gt               lt div style  clear both   gt  lt  div gt           lt  div gt       lt  div gt   lt  body gt   lt  html gt    If this is run  you can see by looking at the  normal  text box that the  wide  text box is sticking out beyond the container  The  normal  text box floats to the actual edge of the container  I m trying to make the  wide  text box fill its container  without expanding beyond edge like the  normal  text box is

User · Answer

box-sizing support is pretty good actually: http://caniuse.com/#search=box-sizing

So unless you target IE7, you should be able to solve this kind of issues using this property. A layer such as sass or less makes it easier to handle prefixed rules like that, btw.

User · Answer

This works    lt div gt       lt input type  text           style  margin  5px  padding  4px  border  1px solid           width  200px  width  calc 100  - 20px    gt   lt  div gt    The first  width  is a fallback rule for older browsers

User · Answer

If you can t use box-sizing border-box you could try removing the width 100  and putting a very large size attribute in the  lt input gt  element  drawback is however you have to modify the html  and can t do it with CSS only    lt input size  1000  gt  lt  input gt

User · Answer

What you could do is to remove the default  extras  on the input   input wide  display block  width 100  padding 0 border-width 0    This will keep the input inside its container  Now if you do want the borders  wrap the input in a div  with the borders set on the div  that way you can remove the display block from the input too   Something like    lt div style  border 1px solid gray   gt    lt input type  text  class  wide    gt   lt  div gt    Edit  Another option is to  instead of removing the style from the input  compensate for it in the wrapped div   input wide  width 100      lt div style  padding-right 4px padding-left 1px margin-right 2px  gt     lt input type  text  class  wide    gt   lt  div gt    This will give you somewhat different results in different browsers  but they will not overlap the container  The values in the div depend on how large the border is on the input and how much space you want between the input and the border

User · Answer

Just style the input to offset for the extra padding   In the following example the padding on the input would be 10px on the left and right for a total padding offset of 20px   input type text      width  calc 100  - 20px

User · Answer

One solution that may work  it works for me  is to apply negative margin at input  textbox     or fixed width for ie7 or to drop ie7 support  This results to pixel perfect width   For me its 7 so i added 3 and 4 but it is still pixel perfect    I had the same problem and i hated to have extra divs for border etc    So here is my solution which seems to work   You should use a ie7 only stylesheet to avoid the starhacks    input text      background-color   fbfbfb      border   solid  eee 1px      width  100       -box-sizing  border-box      -moz-box-sizing  border-box      box-sizing  border-box      height  32px        line-height 32px       margin-left -3px       margin-right -4px      display  inline         padding  0px 0 0 5px

User · Answer

This solved the problem for me   Without the need for an external div  Just apply it to your given text box   box-sizing  border-box     With this property  The width and height properties  and min max properties  includes content  padding and border  but not the margin   See description of property at w3schools   Hope this helps someone

User · Answer

Is there any way to make a text box fill the width of its container without expanding beyond it    Yes  by using the CSS3 property    box-sizing  border-box     you can redefine what    width    means to include the external padding and border   Unfortunately because it s CSS3  support isn t very mature  and as the spec process isn t finished yet  it has different temporary names in browsers in the meantime  So   input wide       width  100       box-sizing  border-box      -moz-box-sizing  border-box      -webkit-box-sizing  border-box      The old-school alternative is simply to put a quantity of    padding-right    on the enclosing  lt div  or  lt td  element equal to about how much extra left-and-right padding border in    px    you think browsers will give the input   Typically 6px for IE lt 8

User · Answer

If you can t use box-sizing  e g  when you convert HTML to PDF using iText   Try this   CSS   input-wrapper   border  1px solid  ccc  padding  0 5px  min-height  20px      input-wrapper input type text    border  none  height  20px  width  100   padding  0  margin  0      HTML   lt div class  input-wrapper  gt        lt input type  text  value    name  city   gt   lt  div gt

User · Answer

If you don t need to do it dynamically  for example  your form is of a fixed width  you can just set the width of child  lt input gt  elements to the width of their container minus any decorations like padding  margin  border  etc        the parent div here has a width of 200px   form-signin input type  text     form-signin input type  password     form-signin input type  email     form-signin input type  number       font-size  16px    height  auto    display  block    width  280px    margin-bottom  15px    padding  7px 9px

User · Answer

Actually  it s because CSS defines 100  relative to the entire width of the container  including its margins  borders  and padding  that means that the space avail  to its contents is some amount smaller than 100   unless the container has no margins  borders  or padding    This is counter-intuitive and widely regarded by many to be a mistake that we are now stuck with   It effectively means that   dimensions are no good for anything other than a top level container  and even then  only if it has no margins  borders or padding   Note that the text field s margins  borders  and padding are included in the CSS size specified for it - it s the container s which throw things off   I have tolerably worked around it by using 98   but that is a less than perfect solution  since the input fields tend to fall further short as the container gets larger     EDIT  I came across this similar question - I ve never tried the answer given  and I don t know for sure if it applies to your problem  but it seems like it will

User · Answer

Just came across this problem myself  and the only solution I could find that worked in all my test browsers  IE6  IE7  Firefox  was the following    Wrap the input field in two separate DIVs Set the outer DIV to width 100   this prevents our container from overflowing the document Put padding in the inner DIV of the exact amount to compensate for the horizontal overflow of the input  Set custom padding on the input so it overflows by the same amount as I allowed for in the inner DIV   The code    lt div style  width  100   gt       lt div style  padding-right  6px   gt           lt input type  text  style  width  100   padding  2px  margin  0                                    border   solid 1px  999    gt       lt  div gt   lt  div gt    Here  the total horizontal overflow for the input element is 6px - 2x padding   border  - so we set a padding-right for the inner DIV of 6px

[html] Can I stop 100% Width Text Boxes from extending beyond their containers?

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